If your version of the textbook starts on page 91, the core concepts cover Climate-Forming Factors :
For a digital version of these topics, you can browse the Uchebnik Vsluh online table of contents or find educational materials on YaKlass . If your version of the textbook starts on
Oil, natural gas, and coal (e.g., in the West Siberian and Kuznetsk basins). and coal (e.g.